CVE-2026-40459

Description

PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP syntax into ID-based search parameters, potentially resulting in unauthorized LDAP queries and arbitrary directory operations. This issue was fixed in PAC4J versions 4.5.10, 5.7.10 and 6.4.1

References

• https://cert.pl/en/posts/2026/04/CVE-2026-40458/
• https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html